Go Down

Topic: Problem interfacing R305 fingerprint module with arduino mega 2560 (Read 1 time) previous topic - next topic

mystnix

hello guys
 
i am working with my summer project and i am using R305 fingerprint module with arduino and currently i am facing problem while interfacing r305  fingerprint module with arduino mega :smiley-sad:


i inserted the RX and TX pins of the r305 on the 10, 11 pins of the mega as mentioned in the adafruit forums and i have also mentioned the pins 10,11 instead of 2,3 in the enrollment code of the installed adafruit library but whenever i upload my program the serial monitor displays " did not find fingerprint sensor ". maybe mega 2560 doesnt detects the fingerprint sensor. i doubt whether this module is compatible with the board or not

i wish if you could just help me with the interfacing

Peter_n

This is the fingerprint sensor I assume : http://www.adafruit.com/product/751
It uses TTL Serial, that should work with the Mega 2560 board as well.

The Adafruit library uses the SoftwareSerial library. I assume that you have a line like this:
Code: [Select]
SoftwareSerial mySerial(2, 3);

But the Mega 2560 board does not allow SoftwareSerial on all pins. See the reference :
http://arduino.cc/en/Reference/softwareSerial
Pin 10 for RX and pin 11 for TX is good.

You should change the sketch also:
Code: [Select]
SoftwareSerial mySerial(10, 11);

Did you try that ? Could you try again ?

mystnix

fingerprint module which i am using is this http://www.vegarobokit.com/index.php?route=product/product&product_id=505

but when i switched the pins from 2,3 to 10,11 it worked   :D  :D  i uploaded enrollment and fingerprint matching  examples from  adafruit library finally detecting fingerprint sensor successfully

thanks a lot for the support and help  :)

mystnix

and the fingerprint is more sensitive so i had to make sure all the wires were soldered and connected properly to the ports

johnwasser

http://arduino.cc/en/Reference/Serial
"The Arduino Mega has three additional serial ports: 
Serial1 on pins 19 (RX) and 18 (TX),  
Serial2 on pins 17 (RX) and 16 (TX), 
Serial3 on pins 15 (RX) and 14 (TX). "

With all those spare serial ports on the MEGA it is unnecessary to use SoftwareSerial which can conflict with other libraries.
Send Bitcoin tips to: 1G2qoGwMRXx8az71DVP1E81jShxtbSh5Hp

rizaaal

http://arduino.cc/en/Reference/Serial
"The Arduino Mega has three additional serial ports:
Serial1 on pins 19 (RX) and 18 (TX), 
Serial2 on pins 17 (RX) and 16 (TX),
Serial3 on pins 15 (RX) and 14 (TX). "

With all those spare serial ports on the MEGA it is unnecessary to use SoftwareSerial which can conflict with other libraries.
how to disable software serial since the library i used, also use that softwareserial library?

here is the error message when i disable #include softwareserial.h in my sketch :

Code: [Select]
In file included from Fingerprint_with_php110415.ino:40:0:
/home/rizal/Downloads/Packages/arduino-1.6.3/libraries/FPS_GT511C3/FPS_GT511C3.h:13:28: fatal error: SoftwareSerial.h: No such file or directory
 #include "SoftwareSerial.h"
                            ^
compilation terminated.
Error compiling.

Rajatgupta

Sir

I m still facing same problem in my r305 while interfacing  to mega2560. I changed my serial pin 2,3 to10,11 .serial monitor is still displaying " fingerprint sensor didnt found".  Some places, they suggested to use sfg demo fingerprint scanner software to interface but i didnt get any download link of it ..
Kindly help me

jitsu553

Pls mention all the connections you have tried from R305 to arduino (mega 2560 or UNO) including the voltage supply


and SFG demo software link http://www.nskelectronics.com/finger_print_scanner.html

sfcsalman

Hi guys,
I am facing the same problem on interfacing the R 305 with arduino uno,It shows that "Did not find fingerprint sensor :(".I am using the adafruit library also it shows one more error that "WARNING: Spurious .github folder in 'Adafruit Fingerprint Sensor Library' library" on uploading the code to the board.

Pls help me to correct the errors..
 

sfcsalman

Hi guys,
I am facing the same problem on interfacing the R305 with arduino uno it responds on the serial monitor as "Did not find fingerprint sensor :(".Also it shows one more error on uploading the code(i am using adafruit library) as"WARNING: Spurious .github folder in 'Adafruit Fingerprint Sensor Library' library".

Please help me to correct the error..

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy